DE102011106386A1 - Endoscopic arrangement - Google Patents

Abstract

An endoscopic assembly (10) having a first distal end (12) on which an imaging device (14) is disposed and a first proximal end (16) for connection to a supply unit (18) having a data transfer element (20) is formed as a light guide and has a second distal end (22) and a second proximal end (24), and an electro-optical transducer (26) adapted to generate digital data generated by the imaging device (14); in an optical signal (30) and the data transmission element (20) at its second distal end (22) is optically coupled to the electro-optical converter (26) to couple the optical signal (30) in the data transmission element (20). The imaging device (14) has at least two data outputs (32, 34) each having a digital output signal (36, 38), and a first signal converter (40) is arranged between the imaging device (14) and the electro-optical converter (26) which is adapted to combine the digital output signals (36, 38) into a digital combined output signal (42).

Description

The present invention relates to an endoscopic arrangement having a first distal end, on which an imaging device is arranged, and a first proximal end for connection to an electrical unit, with a data transmission element, which is designed as a light guide and a second distal end and a second proximal end, and with an electro-optical transducer adapted to convert digital data generated by the imaging device into an optical signal and the data transmission element optically coupled to the electro-optical transducer at its second distal end to couple the optical signal into the data transmission element.

Such an endoscopic arrangement is out DE 199 47 811 C2 known.

In endoscopic arrangements, especially in endoscopes and video-assisted endoscopic units, there is a continuing need for better resolution, especially high-resolution, and color-faithful systems. This is known to affect endoscopic cameras, which are often coupled to rigid endoscopes on the proximal side. As will be explained later, but the invention is also dedicated to the most flexible video endoscopes that carry imaging equipment at its peak. In addition, endoscopic capsules are considered, which pass autonomously through the gastrointestinal tract and thereby transmit their image information. Transmission in endoscopic capsules is wireless according to the prior art. In part, endoscopic capsules have also been equipped with a recording medium for later viewing of the image information. In addition to medical applications, video-assisted endoscopic units are also used in various technical application fields, such as pipe inspection, engine inspection or engine inspection, etc.

In the embodiments according to the prior art, despite all efforts, there are problems with high-resolution or high-resolution image sensors in connection with the image transmission when using thin-caliber diameters with endoscopic transmission lengths, which vary depending on the endoscopic application. Particularly in endoscopic cameras and video endoscopes, there is a demand for transmission systems that are as thin as possible and light, including cables that allow a wide range of possible cable lengths. So far, there is no small-caliber video endoscope with a so-called full HD resolution in the range of two million pixels. Although endoscopic cameras with full HD resolution exist, the cable diameters are relatively large and heavy, making them somewhat unwieldy for endosurgical use.

Particularly problematic is the situation with endoscopic capsules, which can offer according to the current state only a poor image resolution and only a low refresh rate. This is essentially due to the fact that wireless transmission of higher bandwidths through human tissue is not possible. Equipping the endoscopic capsule with a memory, even with the storage media available today, the capacity of the memory and the available space are quickly exhausted when a full HD video with a refresh rate of 25 Hz or 30 Hz or more want to save.

Endoscopic arrays with distal or proximal electronic imaging systems employ sophisticated and expensive cable systems in the prior art to transmit the image information from the endoscope to a remote control unit, as well as to transmit control information and electrical energy from the control unit to the imaging system. The aim of increasing the image resolution is to offer the physician a natural endoscopic image with high resolution for his intervention. The immediate consequence of the higher number of pixels of the image sensors are always higher signal transmission frequencies. To reduce the signal attenuation at higher transmission frequencies and to increase the effective bandwidth, larger cable diameters are required. In addition to the increase in weight but also the electromagnetic compatibility (EMC) is a major problem.

In video endoscopes, there is also the problem that an increase in the cable diameter is hardly possible, since this would be at the expense of an increase in the overall diameter or a reduction in the diameter of other necessary endoscopic components such as suction channels, light guides, etc.

Another requirement for endoscopic cameras and video endoscopes is that the cable systems on the endoscope or on the proximal camera should have an easily detachable connection for cleaning and sterilization purposes. Since the image sensor systems are frequently used, the cable systems are to be regarded as wear items and must be easy to repair or replace. Since the systems have a multi-core complex structure, the cable system with its connections represents a significant share of the cost It is therefore also an objective to reduce the cost price of the cable system.

It is an object of the present invention to provide an improved endoscopic arrangement which, with a small diameter of the transmission system, low attenuation losses and high transmission frequencies, also allows large cable lengths of 5 m and more with low weight and low cost. The endoscopic arrangement should have a low EMC radiation and be used both in endoscopic cameras, video endoscopes and endoscopic capsules.

The object is achieved by an endoscopic arrangement of the aforementioned type, wherein the imaging device has at least two data outputs, each with a digital output signal and between the imaging device and the electro-optical converter, a first signal converter is arranged, which is adapted to the digital output signals to combine a digital combined output signal.

A special feature of the invention is that the digital data of at least two data outputs can be transmitted almost simultaneously, without the need for multiple parallel lines. To achieve this, the digital output signals arrive in a parallel arrangement with the signal converter and are combined there to form a digital combined output signal. In a preferred embodiment, the digital output signals are serialized by means of a multiplexer.

The output signals of the imaging device should be understood as serial signals. If a data output already has parallel output signals which transmit image data, the individual signals of the parallel signals are again understood as a serial signal. The term "parallel" is to be understood in particular as meaning that a plurality of output signals can simultaneously carry useful data with image information.

The imaging device is an image recorder having at least two data outputs, in particular outputs for data and timing information, or at least two image sensors each having at least one data output, in particular d. H. Output with combined data / clock signal. In the first case, it can be an image sensor which has an image surface which, however, is subdivided into at least two subareas for reading out the image data, the information of which is transmitted via a separate data output with a combined data and clock signal. However, it can also be an image sensor having a first data output with a pure data signal and a second data output with a clock signal. In the second case, it may in particular be at least two image sensors with separate image areas, each image sensor having at least one data output with a combined data / clock signal.

The electro-optical converter and the signal converter can each be designed to be discrete, but are preferably combined in one component. The electro-optical converter is preferably designed as a laser diode, in particular as a VCSEL diode (Vertical-Cavity Surface-Emitting Laser). In particular, exactly one laser diode or a maximum of two laser diodes are used, since this keeps the required installation space small.

The imaging device preferably has a lens, or the imaging device is preferably associated with a lens. The design of the electro-optical converter and of the signal converter is preferably designed such that signals can be transmitted and received bidirectionally away from the imaging device and towards the imaging device. This makes it possible in a simple manner to use the data transmission element simultaneously for a transmission of control signals in the direction of the imaging device. However, it is also possible to use an opto-electrical converter for the extraction of control signals at the first distal end at the first distal end. The wavelength of the light generated by the electro-optical converter is preferably between 700 nm and 1550 nm.

As an output signal or data signal should generally be considered a signal containing image data from the image sensor. The output signal need not be limited to pure image data, but may also include timing information or other data describing the image data. It is considered advantageous if the data outputs of the imaging device are each implemented differentially. The resulting parallel differential signals may then preferably be summed before the electro-optical converter or in the electro-optical converter or may be considered as parallel output signals which are combined by the signal converter in the digital combined output signal.

The invention provides a number of advantages, including the small distal-side size and the very small diameter of the data transmission element at a high data rate, in particular more than 1 Gbit / s. Furthermore, there are no EMC problems over the Line length. In comparison, electrical lines act like an antenna, with shielding always critical due to space or diameter issues. The electro-optical coupling also provides a galvanic decoupling, which according to the standard is useful for medical endoscopic systems. In addition, a further advantage is that the system is suitable for use in MR systems (magnetic resonance systems) due to its short electrical lines and the optical transmission, at least with regard to the desired information transmission at high resolution.

With regard to the first signal converter, it is preferred that it comprises an encoder and a multiplexer which generates from the plurality of digital output signals of the imaging unit a combined digital output signal of higher clock rate and without DC component. In particular, an 8B / 10B encoding can be used in which a 10-bit word is assigned to each 8-bit word so that a common-mode rejection is effected. The multiplexer preferably operates according to the time division multiplex method, wherein both a synchronous and an asynchronous mode of operation is possible.

The electrical unit is preferably a supply unit or a camera control unit which supplies the distal electronics electrically, controls the imaging device and further processes the image information.

This completes the task.

In an advantageous embodiment, the signal converter has a buffer memory which is designed to store at least one of the digital output signals, preferably all digital output signals, temporarily.

This embodiment offers a particularly high flexibility with regard to the processing of the plurality of output signals. In particular, it is thereby made possible that the data rate during transmission via the data transmission element is higher, preferably significantly higher, and in particular at least twice the data rate of an output signal from a data output of the imaging device. It is preferred that the buffer memory be chosen so large that at least the information of an image pixel, preferably at least one row of pixels, and more preferably at least one complete image, as it can be output from the corresponding data output, can be buffered. This makes it possible to merge the digital combined output signal pixel by pixel, line by line or image by image. Since very high data rates can be transmitted via the data transmission element, it is thus readily possible, for example, to transmit the image information of four image areas at four times the data rate via the data transmission element almost simultaneously.

In a preferred embodiment of the invention, the imaging device has a video resolution of more than 0.75 megapixels, preferably more than 1.5 megapixels, more preferably more than 2 megapixels and in particular more than 3 megapixels.

This refinement is advantageous because it is also possible to easily transmit large quantities of image data by means of the endoscopic arrangement. The term "video resolution" is to be understood in particular a resolution in which at least 15 images per second, preferably at least 25 images per second and more preferably at least 30 images per second are transmitted.

In a further advantageous embodiment of the invention, a first opto-electrical converter is arranged at the second proximal end of the data transmission element, which is adapted to decouple the optical signal from the data transmission element and to convert the optical signal into digital data, wherein with the first opto-electrical converter, a second Signal converter is connected, which is adapted to divide a digital combined output signal into at least two digital output signals.

This embodiment enables a particularly simple recovery of the original signals that have been transferred to the first signal converter. The fact that the digital combined output signal is also spoken on the proximal side should be understood to mean that the signal, even though it is no longer the same physical signal due to the electro-optical and opto-electrical conversions, still contains the same information as the distal-side digital combined output signal. As a second signal converter is preferably a de-multiplexer is used.

In a further advantageous embodiment of the invention, a spectral divider is arranged between the electro-optical converter and the second distal end of the data transmission element.

This embodiment makes it possible in a simple manner to use the data transmission element bidirectional. If light, in particular visible light, is coupled from the proximal side into the data transmission element, then it can be separated distally from the light by means of the spectral divider, which differs from the electro-optical one Transducer is sent out for the purpose of transmitting information. The spectral divider can be used effectively in particular if there is a sufficiently large distance between the wavelength for the transmission of information and the wavelength for the transmission of visible light. For this purpose, the upper limit of the wavelength for the visible light lies in particular at 650 nm, preferably 550 nm and particularly preferably 500 nm. The lower limit of the wavelength is 700 nm for information transmission, preferably 900 nm and more preferably 1100 nm Bidirectional transmission provides a dual benefit without increasing the diameter of the transmission medium. For the spectrally separated transmission of light in the visible range and information in the infrared, in particular near-infrared, range, multimode fibers are preferably used.

In a further preferred embodiment of the invention, a second opto-electrical converter is arranged at the first distal end of the endoscopic arrangement, which is designed to convert light, which is coupled into the data transmission element on the proximal side, into electrical energy.

This refinement offers a good possibility of using the data transmission element bidirectionally and of providing electrical energy on the distal side under galvanic decoupling, in particular for the operation of the imaging device. For this purpose, the energy which is to be provided at least partially at the first distal end of the endoscopic arrangement is fed into the data transmission element on the proximal side. At the first distal end of the endoscopic arrangement, the light is preferably coupled out via a spectral divider. The light intended for the energy supply then passes to the opto-electrical converter, which is designed in particular as a solar cell.

In a further advantageous embodiment of the invention, an outlet for visible light and a luminescence converter are arranged at the first distal end of the endoscopic arrangement, wherein the luminescence converter is designed to convert light guided in the data transmission element in the direction of the distal side into white light and to the outlet forward.

This embodiment offers the advantageous possibility of providing light supplied on the proximal side as white light and at the same time enabling a good spectral separation between the light and the light used for the information transmission. As already explained, the separation between the light for illumination purposes and the light for the information transmission can be achieved particularly well if there is a clear distance between the wavelengths used. However, this in turn means that the light is preferably in the blue to violet range for illumination purposes and thus has a color unsuitable for endoscopic observation. By passing the light onto a luminescence transducer, which is designed in particular as a fluorescence or phosphorescence transducer, a blue light, at least one white-like light, is obtained from the blue / violet light. This light is suitable for lighting purposes.

In a further advantageous embodiment of the invention, a light source is arranged at the first proximal end of the endoscopic arrangement, which is designed to couple light at the first proximal end into the data transmission element.

In this way, the data transmission element can additionally be used for illumination possibility and / or extraction possibility of electrical energy at the first distal end of the endoscopic arrangement. The wavelength of the light emitted by the light source is preferably between 380 nm and 490 nm, in particular between 390 nm and 430 nm. The data transmission element is advantageously designed as a multimode fiber.

In a further advantageous embodiment of the invention, the data transmission element at the first proximal end of the endoscopic arrangement on a separation point, which is adapted to allow the endoscopic arrangement to be separated from a proximal-side electrical unit and / or rotatably coupled.

This embodiment enables a particularly simple interchangeability of the endoscopic arrangement. If the separation point is arranged in the data transmission element, then the separation point can be realized particularly simply if the transmission elements are formed coaxially within the data transmission element. It can be achieved so the rotatability of the endoscopic arrangement relative to the proximal-side electrical unit. This results in a particularly good usability.

In a further advantageous embodiment of the invention, the data transmission element is designed as a single-mode fiber.

This embodiment allows a particularly small diameter of the data transmission element. The fiber core of a single-mode fiber is usually less than 10 μm. In addition, single-mode fibers have low attenuation. As optimal transmission wavelength currently considered 1550 nm ± 200 nm, preferably 1550 nm ± 100 nm, and more preferably 1550 nm ± 50 nm. The endoscopic arrangement thus enables minimum diameter dimensions for endoscopic HD image acquisition and transmission, which could not previously be realized. The optical waveguide is in particular at a diameter of less than 0.1 mm.

In a further advantageous embodiment of the invention, the imaging device is adapted to transmit the output signals according to the specification MIPI D-PHY or MIPI M-PHY.

This embodiment uses a device-internal, serial standard transmission format from the mobile communications sector, which, however, can only be used for short cable lengths of less than 30 cm and is therefore previously unknown in endoscopy. Since the proposed endoscopic arrangement requires electrical lines but only up to the first signal converter or to the electro-optical converter, and the majority of the transmission path via the data transmission element designed as a light guide is almost no attenuation, the advantageous standard can now surprisingly be used in endoscopy. Due to the optical transmission, the transmission lengths can be arbitrarily varied in a wide range and can be increased far beyond the limit of 30 cm, without significantly changing the high-frequency signal, for example by attenuation. The use of this standard also makes it possible to use a large number of cost-effective image sensors. This eliminates the need for costly proprietary image sensors. The MIPI M-PHY specification is a similar upcoming standard that will be used in the mobile communications industry.

In a further advantageous embodiment of the invention, the first signal converter is designed to couple the digital combined output signal into at least two fibers of the data transmission element.

In this way, a particularly high reliability of the endoscopic arrangement can be ensured. If one of the fibers of the data transmission element fails due to a defect, then the complete image information is still transmitted via the remaining fiber (s). If the proximal-side opto-electrical converter and / or the second signal converter are designed to check the functionality of the fibers of the data transmission element and detect the failure of a fiber, the physician may be advised of the need for repair or replacement without any current intervention must be interrupted.

In a preferred embodiment of the invention, the opto-electrical converter and / or the second signal converter can be coupled to the electrical unit via an electrical connector.

In this embodiment, it is a cost-effective way to allow easy replacement of the endoscopic arrangement. Endoscopic arrangements, as shown, may be implemented primarily as flexible or rigid video endoscopes or video catheters carrying the imaging unit in the distal region. However, they may also be endoscopic cameras that are coupled to conventional endoscopes and that are designed to be light and small in their distal part in their design.

In a further advantageous embodiment, the endoscopic assembly is part of an endoscopic capsule, the capsule having a capsule body in which the distal-side elements of the endoscopic assembly are enclosed, and an introducer system.

Such an endoscopic capsule offers a small size with high image quality.

In a further advantageous embodiment of the invention, the endoscopic arrangement is part of an endoscopic capsule, wherein the data transmission element is wound on the proximal side as a roll on a rolling device.

In this way, the endoscopic capsule can be applied particularly easily, without the risk that the data transmission element gets tangled. Since the data transmission element - as described - has a diameter of less than one millimeter and in addition to the signal transmission can also be used simultaneously to the light and energy supply, it represents a very suitable, according to today's estimation optimal, connecting element, without the movement of the capsule in Hamper gastrointestinal tract.

In a further advantageous embodiment of the invention, the endoscopic arrangement is part of an endoscopic video camera for the examination of hollow organs or cavities. The data transmission element is designed as a hybrid cable, which carries both the optical waveguide for data transmission and electrical leads for power supply and low-frequency control signals.

In a further advantageous embodiment of the invention, the endoscopic arrangement is part of a video endoscope, wherein in the data transmission element, a plug system is integrated, whereby it is possible, for example, the optical signal line at the endoscope handle or distal near the image sensor or on the proximal side to a Lichtleitstecker for example To separate cleaning purposes.

In a further advantageous embodiment of the invention, the endoscopic arrangement is detachably arranged on an endoscope body.

In a further advantageous embodiment of the invention, the endoscopic arrangement is part of a laryngoscope, in particular a disposable laryngoscope, wherein the data transmission element leads into a handle of the laryngoscope and there in addition to the opto-electrical converter and the second signal converter, a data compressor and a wireless transmitter (wireless Transmitter, for example WIFI, WHDI, WirelessHD, UWB, WiGig, etc.), which enables wireless communication of the image data to the supply unit or to a monitor, are integrated.

In a further advantageous embodiment of the invention, the endoscopic arrangement is integrated into a rigid or flexible endoscope, wherein the data transmission element extends into the proximal endoscope handle, wherein in the endoscope handle an optical transducer, a data compressor and a wireless transmitter (wireless transmitter, WIFI) arranged are.

In a further advantageous embodiment of the invention, the endoscopic arrangement is part of an endoscopic capsule for the examination of the gastrointestinal tract or other hollow organs or cavities, the capsule having a battery for the distal energy supply of the electrical components.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. Show it:

1 a first embodiment of an endoscopic arrangement;

2 a second embodiment of an endoscopic arrangement;

3a a first embodiment of an imaging device;

3b a second embodiment of an imaging device;

3c a third embodiment of an imaging device;

4 a third embodiment of an endoscopic arrangement;

5 a fourth embodiment of an endoscopic arrangement;

6 a fifth embodiment of an endoscopic arrangement;

7a a first embodiment of a separation point for an endoscopic arrangement;

7b a second embodiment of a separation point for an endoscopic assembly;

7c a third embodiment of a separation point for an endoscopic arrangement; and

8th a sixth embodiment of an endoscopic arrangement in an endoscopic capsule.

1 shows an endoscopic arrangement 10 with a first distal end 12 at which an imaging device 14 is arranged, and a first proximal end 16 for connection to an electrical unit 18 , The order 10 also has a data transfer element 20 on, which is designed as a light guide. The data transmission element 20 has a second distal end 22 and a second proximal end 24 ,

The data transmission element 20 preferably has a length of at least 1 m, more preferably of at least 3 m and in particular of at least 5 m. The data transmission element 20 is formed in this first embodiment as a single mode fiber. The imaging device 14 is trained here, the digital output signals 36 . 38 according to the specification MIPI D-PHY or MIPI M-PHY. The same specification applies to the signals 36 ' . 38 ' ,

The order 10 also has an electro-optical converter 26 trained to receive digital data from the imaging device 14 be generated in an optical signal 30 to change. The data transmission element 20 is at its second distal end 22 optically with the electro-optical converter 26 coupled to the optical signal 30 in the data transmission element 20 couple.

The imaging device 14 has at least two data outputs 32 . 34 each with a digital output signal 36 . 38 on. In other words, the data outputs 32 . 34 each adapted to a digital Ausgangssignnal 36 . 38 issue. Between the imaging device 14 and the electro-optical converter 26 is a first signal converter 40 arranged, which is designed here as a multiplexer. The first signal converter 40 is designed for the digital output signals 36 . 38 to a digital combined output signal 42 merge.

The imaging device 14 has a video resolution of more than 0.75 megapixels, preferably more than 1.5 megapixels, more preferably more than 2 megapixels (Full HD), and more preferably more than 8 megapixels (Quad HD) at a frame rate of preferably at least 15 frames per second, more preferably at least 25 frames per second, and more preferably at least 30 frames per second.

For so-called quad-HD systems already exist product announcements for CMOS image sensors relatively small size with image resolutions over 8 megapixels, such. Example, the image sensor OV10810 the company Omnivision, St. Barbara, USA. These image sensors, which can be used for endoscopy, require a further quadrupling of the transmission rate compared to full HD. At standard frame rates of at least 25 frames per second, this results in very high transfer rates of several GBit / s. In the case of endoscopic framework conditions, these are advantageously implementable in an optimal manner with the illustrated endoscopic arrangement in accordance with small transmission system diameters.

At the second proximal end 24 of the data transmission element 20 is a first opto-electric converter 44 arranged. The optoelectric converter 44 is designed to receive the optical signal 30 from the data transmission element 20 decouple and the optical signal 30 to convert into digital data. The first optoelectric converter 44 is with a second signal converter 46 connected, which is adapted to a digital combined output signal 42 ' in at least two digital output signals 36 ' . 38 ' divide. It should be noted that the opto-electrical converter 44 and the second signal converter 46 in the electrical unit 18 can be integrated.

The marking of the signals in 36 and 36 ' . 38 and 38 ' respectively. 42 and 42 ' indicates that, because of the intermediate levels in the signal transmission, it is not physically the same signal, but the information transmitted distally is contained in the information received at the proximal end.

The imaging device 14 is an optical arrangement 50 associated with an optical path having an optical axis 52 for distally incident light to the imaging device 14 provides. The optical arrangement 50 here has a biconvex lens 54 and a prism 56 on. In this embodiment, the endoscopic arrangement 10 including the opto-electrical converter 44 and the second signal converter 46 , which is a de-multiplexer, via an electrical connector 60 with the electrical unit 18 connected. As indicated in the figure, the connection is detachable. There is therefore a simple way of endoscopic arrangement 10 to exchange for another arrangement.

There is also an electrical supply line 62 which energizes the distal and proximal electrical components.

2 shows a second embodiment of an endoscopic assembly 10 , The explanations on the mode of operation, which have already been made with regard to the first exemplary embodiment, will not be repeated here and also apply to these and the following figures. For the sake of clarity, not all reference numerals are shown. Rather, the reference numerals that were introduced in the explanation of the first embodiment, also apply to this and the following figures.

In contrast to 1 is the endoscopic arrangement 10 in the second embodiment of a wrapper 63 surround. The serving 63 protects the endoscopic arrangement from external influences, especially from moisture.

The first signal converter 40 has a buffer memory in this embodiment 64 on, which is designed for at least one of the digital output signals 36 . 38 - here both digital output signals 36 . 38 - temporarily save. This allows the digital combined output signal 42 merge particularly flexible.

The data transmission element 20 has at least two fibers in the second embodiment 66 on. The first signal converter 40 is adapted to the digital combined output signal 42 into the two fibers 66 of the data transmission element 20 couple. The coupling into the two fibers 66 can preferably be done by a light source in the electro-optical converter 26 . which is designed in particular as a laser diode, light in both fibers 66 is coupled. It may be particularly preferred in terms of safety, the coupling into the two fibers 66 each to realize their own light source. In this way, a particularly high level of security during data transmission can be ensured.

In this context, it is advantageous if the endoscopic arrangement 10 via a monitoring unit 68 which checks the functionality of the optical transmission link. For example, the transmission falls over one of the fibers 66 off or if the signals are above the individual fibers 66 be evaluated separately, the received signals are different from each other, so an indication can be given that the endoscopic arrangement 10 should be checked and if necessary repaired or exchanged.

3a shows a first embodiment of an imaging device 14 , There is an image sensor 70 shown with a continuous image area, but with a first part 72 and a second part 74 the image area separated by the data outputs 32 and 34 be read out.

3b shows a second embodiment of an imaging device 14 , Here are two image sensors 70 present, each with a data output 32 respectively. 34 be read out.

3c shows a third embodiment of an imaging device 14 , Here are four image sensors 70 arranged, each with a data output 32 . 33 . 34 respectively. 35 be read out.

4 shows a third embodiment of an endoscopic arrangement 10 , Here is between the electro-optical converter 26 and the second distal end 22 of the data transmission element 20 a spectral divider 76 arranged. Also, at the first proximal end 24 the endoscopic arrangement 10 a light source 78 arranged, here in the electrical unit 18 integrated, which is designed to light 80 at the first proximal end 24 in the data transmission element 20 couple. The coupling takes place here via another spectral divider 82 instead of.

At the first distal end 12 the endoscopic arrangement 10 is an exit 84 for visible light and a luminescence converter 86 arranged, wherein the luminescence converter 86 designed for this, in the data transmission element 20 led light to convert into white light and to the exit 84 forward.

In this third embodiment, the light source transmits 78 blue light out, and the wavelength of light for the transmission of image data from the distal side to the proximal side is in the infrared, especially near-infrared, area. The different wavelengths can be so from the spectral splitters 76 . 82 be separated very well. At the spectral divider 76 the blue light is directed towards the luminescence transducer 86 directed. There it is transformed into white light, at least in white-like light, and then to the exit 84 directed.

5 shows a fourth embodiment of an endoscopic arrangement 10 , Here is at the second distal end 22 the endoscopic arrangement 10 a second opto-electrical converter 88 arranged, which is adapted to light, the proximal side in the data transmission element 20 is coupled to convert into electrical energy. The decoupling of the light, the second opto-electrical converter 88 is guided here, by means of a partially transmissive mirror 90 decoupled. The electrical energy is used to supply the distal-side electrical components, here the imaging device 14 , the first signal converter 40 and the electro-optical converter 26 , used.

6 shows a fifth embodiment of an endoscopic arrangement 10 , The data transmission element 20 points at the first proximal end 16 the endoscopic arrangement 10 a separation point 92 designed to allow the endoscopic arrangement 10 from a proximal electrical unit 18 to separate.

7a shows a first embodiment of a separation point 92 in cross section. At the core of the data transfer element 20 becomes a fiber 94 arranged for the transmission of information from the distal side to the proximal side. The fiber 94 is from a reflection layer 96 surround. The reflection layer 96 is of another fiber or fibers 98 in which visible light is guided from the proximal side to the distal side. As already explained, it is also possible, the visible light through the fiber 94 to lead, if the fiber 94 is designed as a multimode fiber. Finally, the data transmission element has 20 a serving 100 , The construction shown allows one complete rotation of the endoscopic arrangement with respect to the electrical unit 18 ,

7b shows a second embodiment of a separation point 92 in which the light is for information transmission and the visible light is in a fiber 94 be transferred with reflection layer. The fiber 94 is from an electrical conductor 102 surrounded, in turn, an envelope 100 surrounds. The electrical connection at the separation point 92 can be realized for example via a slip ring. So remains in this embodiment, a complete rotation of the endoscopic arrangement 10 opposite the electrical unit 18 guaranteed.

7c shows a third embodiment of a separation point 92 , Here is the fiber 94 with reflection layer from the cladding 100 surround. Such a separation point 92 can in particular in the embodiment according to 5 be used. It transfers the fiber 94 the image information from the distal side to the proximal side and visible light from the proximal side to the distal side. The light is used on the proximal side both as illumination light and for the production of electrical energy.

8th shows an endoscopic capsule 110 with an endoscopic arrangement 10 , The endoscopic arrangement 10 is here in a capsule body 112 including, in particular, the distal-side elements of the endoscopic arrangement. It also shows the endoscopic capsule 110 an insertion system 114 on. The data transmission element 20 is proximal as a role on a rolling device 116 wound. The recovery from the optical signal takes place here in the electrical unit 18 ,

Overall, an endoscopic arrangement has been shown which, despite the considerable spatial limitations in endoscopy applications, enables the reliable transmission of high- and high-resolution video images.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19947811 C2 [0002]

Claims (15)

Endoscopic arrangement ( 10 ) having a first distal end ( 12 ), where an imaging device ( 14 ) and a first proximal end ( 16 ) for connection to a supply unit ( 18 ), with a data transmission element ( 20 ), which is designed as a light guide and a second distal end ( 22 ) and a second proximal end ( 24 ), and with an electro-optical converter ( 26 ), which is adapted to receive digital data from the imaging device ( 14 ), into an optical signal ( 30 ) and the data transmission element ( 20 ) at its second distal end ( 22 ) optically with the electro-optical converter ( 26 ) is coupled to the optical signal ( 30 ) in the data transmission element ( 20 ), characterized in that the imaging device ( 14 ) at least two data outputs ( 32 . 34 ) each with a digital output signal ( 36 . 38 ), and between the imaging device ( 14 ) and the electro-optical converter ( 26 ) a first signal converter ( 40 ) arranged to receive the digital output signals ( 36 . 38 ) to a digital combined output signal ( 42 ) merge. An endoscopic device according to claim 1, wherein the first signal converter ( 40 ) a buffer memory ( 64 ) adapted to receive at least one of the digital output signals ( 36 . 38 ), preferably all digital output signals, temporarily store. Endoscopic arrangement according to one of the preceding claims, wherein the imaging device ( 14 ) has a video resolution of more than 0.75 megapixels, preferably more than 1.5 megapixels, more preferably more than 2 megapixels and in particular more than 8 megapixels. Endoscopic arrangement according to one of the preceding claims, wherein at the second proximal end ( 24 ) of the data transmission element ( 20 ) a first opto-electrical converter ( 44 ) is arranged, which is adapted to the optical signal ( 30 ) from the data transmission element ( 20 ) and the optical signal ( 30 ) into digital data and with the first opto-electrical converter ( 44 ) a second signal converter ( 46 ) adapted to generate a digital combined output signal ( 42 ' ) into at least two digital output signals ( 36 ' . 38 ' ). Endoscopic arrangement according to one of the preceding claims, wherein between the electro-optical transducer ( 26 ) and the second distal end ( 22 ) of the data transmission element ( 20 ) a spectral divider ( 76 ) is arranged. An endoscopic assembly according to any one of the preceding claims, wherein at the first distal end ( 12 ) of the endoscopic arrangement ( 10 ) a second opto-electrical converter ( 88 ), which is adapted to light ( 80 ), the proximal side in the data transmission element ( 20 ) is coupled, to convert into electrical energy. An endoscopic assembly according to any one of the preceding claims, wherein at the first distal end ( 12 ) of the endoscopic arrangement ( 10 ) an exit ( 84 ) for visible light and a luminescence converter ( 86 ), wherein the luminescence converter ( 86 ) is designed to be used in the data transmission element ( 20 ) guided light ( 80 ) into white light and to the outlet ( 84 ) forward. Endoscopic arrangement according to one of the preceding claims, wherein at the first proximal end ( 16 ) of the endoscopic arrangement ( 10 ) a light source ( 78 ), which is adapted to light ( 80 ) at the first proximal end ( 16 ) in the data transmission element ( 20 ). Endoscopic arrangement according to one of the preceding claims, wherein the data transmission element ( 22 ) at the first proximal end ( 14 ) of the endoscopic arrangement ( 10 ) a separation point ( 92 ) adapted to enable it to be adapted to the endoscopic arrangement ( 10 ) from a proximal electrical unit ( 18 ) and / or rotatably couple. Endoscopic arrangement according to one of the preceding claims, wherein the data transmission element ( 20 ) is formed as a single mode fiber. Endoscopic arrangement according to one of the preceding claims, wherein the imaging device ( 14 ) is adapted to the digital output signals ( 36 . 38 ) according to the specification MIPI D-PHY or MIPI M-PHY. Endoscopic arrangement according to one of the preceding claims, wherein the data transmission element ( 20 ) at least two fibers ( 66 ) and the electro-optical converter ( 26 ) is adapted to receive the digital combined output signal ( 42 ) into the at least two fibers ( 66 ) of the data transmission element ( 20 ). Endoscopic arrangement according to one of claims 4 to 12, wherein the opto-electrical converter ( 44 ) and / or the second signal converter ( 46 ) via an electrical connector ( 60 ) to the electrical unit ( 18 ) can be coupled. Endoscopic capsule ( 110 ) with an endoscopic arrangement ( 10 ) according to any one of the preceding claims, wherein the capsule ( 110 ) a capsule body ( 112 ), in which the distal-end elements of the endoscopic arrangement ( 10 ) and an introducer system ( 114 ) having. Endoscopic capsule, in particular according to claim 14, with an endoscopic arrangement ( 10 ) according to one of claims 1 to 13, wherein the data transmission element ( 20 ) proximally as a roll on a rolling device ( 116 ) is wound.

Images